<header>Optional transport for unknown recipients</header>

<center><tt>fallback_transport</tt></center>
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This parameter specifies the optional transport in <tt>master.cf</tt> to use
for recipients that are not found in the UNIX <tt>passwd</tt> database.

<p>

This parameter has precedence over the
<a href=opt_luser_relay><tt>luser_relay</tt></a> parameter.


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